Brake for cars.



ll l 1. s. MCWHLRTER.

BRAKE FOR CARS, APPLICATloN FILED 050.29, 1915.

Patented Jan. 30, 1917.

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BRAKE FOR GARS.

APPLICATION men DEC. 29, |915.

Lm 3,92% Patented Jan. so, 1917.

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JOHN S. MCWHIRTER, OF NEW YORK, N. Y., ASSIGNOR IO THE J. G". BRILLCOMPANY, F PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

BRAKE FOR CARS.

Application filed December 29, 1915.

To all fwtom t may concern.'

13e it known that I, JOHN S. MCWHIRTER, a citizen of the United States,and a resident of the city, county, and State of New York, (whosepost-oiice address is Sixtyfifth street and rlhird avenue, New Yorkcity,) have invented a new and useful Improvenient in Brakes for Cars,of which the following` is a specification.

lihe object of my invention is to provide a brake which is suitable forelectric cars, and particularly those which carry a low car body. Thisobject is accomplished by my invention wherein, in the preferredembodiment, the brake rigging is carried by the motor casing mounted onthe axle, and the brake shoes are applied to a drum which is mounted onthe axle and fixed thereto so that the brake is always applied to thedrum and never to the wheels, whereby all strain on the axle bearings iseliminated, the life of the wheels is not reduced by the usual wear,incidental to brake shoes being applied thereto, and the brake is mademuch lighter and more compact than is customary in such structures.rllhese and other advantages are accomplished by my invention, oneembodiment ot which is hereinafter set forth.

For a more particular description of my invention, reference is to behad to the accompanying drawings forming a part here of, in which-Figure 1 is a plan view of a motor casing carrying my improved brakemechanism. Fig. 2 is a sectional view, taken on the line 2-2 of Fig. 1,looking in the direction of the arrows. Fig. 3 is an end elevation of myimproved brake mechanism, parts of a motor casing and a car wheel beingshown. Fig. 4 is an enlarged view of parts of the said brake mechanismand parts adjacent thereto, the view being taken in the oppositedirection from the view taken of Fig. 3. Fig. 5 is a sectional view,taken on the line 5-5 of Fig. 1, looking in the direction of the arrows.

t tween the motor casing 2 and one of the Specification of LettersPatent.

Patented dan. 3U, 191'?.

Serial No. 69,141.

wheels 4, a drum 5 is fixed to the axle 3, so that the brake shoes G maybe applied to this drum instead of the wheel 4.

In the preferred embodiment of my invention, two brake shoes (i areemployed and these slices are placed at diametrically opposite points ofthe drum 5 and carried in suitable brake shoe heads 7, in theconventional manner, and these heads are supported by suitable hangers 8at one side and the levers 9 at the other. The hangers 8 and the levers9 are hung from the parallel bars 10 and 11 which are carried by andsecured to the transverse bars 12 and 13 respectively which are iixed tothe motor casing 2 by bolts 14, or any other suitable means. The bar 12is flat at its center portion, and this Hat portion extends as far asthe outside of the motor casing 2. Secured to the end of the bar 12 isan angle bar 12a. The bars 10 and 11 are not integral throughout in theembodiment of my invention shown in Fig. 1, but are divided into twoparts near the levers 9, and these parts are connected by a web oriiller 1G, and the parts 15 are connected by this iiller 16 throughwhich the bolts 17 pass that hold together, and in proper relation, thebars 10 and 11 and the ends 15. These ends 15 are provided with suitablecups 18 to receive corresponding projections on the levers 9 and formtherewith a ball and socket joint, the bolts and sockets being kepttogether in suitable position by means of the bolt 19 on which ismounted a suitable coil spring 20, in the conventional manner. r1`he extreme ends of the extensions 15 are connected to the bar 13 by means ofa U 21 Secured by suitable bolts 22, one at each end, and through thecenter of the U is a perforation through which passes a bolt 23 on whichare two coil springs 24, one above and one below the U 21, and the bolt23 passes through a suitable perforation in the bar 13 so that at oneend of the parallel bars 10` and 11, they are lspring supported and freeto partake of the vertical movement of the axle as it shifts in thepedestals of the truck whereby the brake mechanism can always besupported at the proper level. An inverted L-shaped member 25 rests onthe central portion of the U 21 and the bolt 23 passes through thehorizontal leg of the member 25. At the lower end of the verticallyextending leg of the member 25 is a "ing the parts to beaslshownin Fig.1, when perforation through which passes a bolt 26, on which is mounteda suitable coil spring 27, "so that said spring 27 holds the brake shoe6 'away from the drum 5, and the member'25 holds the bolt 26 in properalinement with the shoe holder 7. rIhe lever 9, under the action of thesprings slides against the bar 13, which thus limits the pull of theretracting spring 27. A. two part bolt 28 with its two parts connectedby a coil spring 29 is connected in a simil-'ar way to the other brakeshoe holder 7 and this bolt 28 passes through a Asuitable perforation inthe 'angle bar 12a which supports its free end. The spring 29 isexpanded when the brake Tshoes are applied and withdraws them whenreleased. The angle bar 12:i also carries a suitable bracket 30 in whichAis mounted, at its upper end, a suitable pin 31 on whicliare placed thetwo Cextreme and downwardly extending ends of the bars 10 and 11 so thatthe vsame lare pivotally supported iii p'a'rafllel relation from theangle bar 12e, the bracket 30 servingto keep these bars separated and inproper position one `with 'regard to the other.

The "brake is actuated iby means of 4a suitable lever 32 pivotallymounted in suitable ears '33 by mea-ns oi a ul'cruni or pin 3%, and theother end of this lever 32 Iruns to a Fse'coiid pin 335 which p'ivotallyvconnects this lever 32 with fa `clevis 36 vat one end of a rod 37,=aidthelother end oi this rod `has a 'second elevis l38 vin which is a pinwhich coiinec'ts this fred 37 to a vertical lever 39. yThe lower end fofthis :lever 39 is `provided. with `a sui-table pin t() which connectsthe ylower 'end of this lever-39 to a clevis 41 =o1i Va link 4:2 whichhas one end L.t3 provided with 'suitable screw threads, Eand carried onlthe"s'crew-threaded end '43 isasuitable sleeve 44, the position ofwhich is controlled by aflock-nut :45, and vth-is sleeve rests betweenrthe two Ylevers 9 fandis "connected :thereto by means ofsuitableprojections or pins L16.

The free end vof the -motor casing 2 Yis supported by `mea-ns of a`'projection from a car :body or truck -frame provided with a pinpassing through the 'open-ing 50 in the ears 511and 52 'which-are fixedto the bar 12.

` The links 8 'and-the l'levers9 areconnected to the brake Ashoe holders7 by means 'of a pin 47 and a ybolt 48 respectively. The bolt 48 hassuitable connections 'corresponding to' those on lthe `bolt 19 `such 'asball and vsocket j'ointsyspringetc., andthe pin L17 not `fonly'passesthrough 'fthe links 8 but also through the lever 39 'and forms afulcrum for the same as will appear below. The

lnipperends of the links S are connected to the .parallel fbars 10 and11 by means :of suitable lbolts'l9 lwhich may be secured in any"suitable way.

-The brake is applied as follows: Assumthe inner end of the lever 32 ispulled to the right, this lever swings on its iulcrum 3a and forces itsother end, with its pin 35, to the lett. The pin 35 forces the link 37and the upper end of the lever 39 to the lett thereby forcing one brakeshoe 6 against the drum 5, and against the tension of spring 29, andthe. lever 39 swings on the pin 47 as a ulcruni and through theconnections above described draws the lower end of the lever 9 to theright, las will be lclear from Fig. This lever draws theI brake shoe 6on the lett against the `drum v5 and against the tension of the spring27, so that the brake shoes G lare pullediii opposite directions againsttlie drum 5 at diaiiietiically opposite points so that no strainwhatever is Aput on the bearings when the brakes arc applied. There is'a slight tendency of the brake shoes to rotate in the direction inwhich the Adrum 5 rotates but this is entirely provided for by theconnections above described, lso that the brake shoes, under allconditions of service, bear true upon the drum and Aagainst the same, asabove set iortli. `It will be observed ythat this braking mechanism `lissupported directly 'from the axle through the motor casing and is alwayscarried in proper relation vto the axle, regardless of the relativepositions of other parts ofthe car, so that this brak-ing mecha iilisniis particularly adapted for radiating cali' trucks. 1t is to be furtherobserved that the space occupied `by the brake 'mechanism isexceedinglylimited so that -it may be applied with advantage to lowcars, and particularly those low cars which have radiating axles.

While I have shown and described one embodiment of -my invention, it isobvious that it is not restricted thereto, but is broad Yenough to coverfall structures that come within the scope of the annexed claims.

Having :thus described any invention, what l 'claim is:

v1. fn a v`brake, a motor casing,an axle on 'which Vthe motor casing issleeved, a drum on the axle and fixed thereto, and braking mechanism`supported from the motor casing and applied to the drum.

In a brake mechanism, an axle, a drum Vfixed thereon, a motor-casingsleeved to said allel bars.

'3. In a brake mechanism, an axle, a drum mounted thereon, aiii'otor-casing sleeved on said'axle, parallel bars at one end vof saidmotor-casing and above said axle, 'means for supporting said bars vfromsaid motorcasin'g, brake-"shoes and means for suspending the same fromsaid parallel bars, and mechanism for causing said brake shoes tosimultaneously engage said drum at 0pposite points When the brake isapplied, and to disengage said drum When the brake is released.

4L. In a brake mechanism, an axle, a drum fixed thereon, parallel barsabove said axle and adjacent to said drum, means for supporting saidbars from said axle, brake shoes adjacent to said drum, brake shoeholders holding said brake shoes, hangers supporting one of said holdersand levers supporting the other of said helders, a live lever and a linkconnecting the same with the said first mentioned levers, and means forwithdrawing the brake shoes from the drum after the brake has beenapplied.

5. ln a bralre mechanism, an axle, a motor casing sleeved thereon,transverse bars secured to said motor-casing, and parallel barssupported by said transverse bars, said parallel bars being connected toone transverse bar by pivotal means and to the other transverse bar byresilient means.

6. ln a brake mechanism, an axle, a motor casing sleeved thereon,transverse bars running from said motor casing, parallel bars supportedby said transverse bars, brake shoes, brake shoe holders secured to saidbrake shoes, mechanisms for supporting said brake shoe holders from saidparallel bars, release springs, bolts connecting said release springs tosaid brake shoe holders and means for causing said releasel springs todran7 said brake shoe holders toward said transverse bars.

7. In a brake mechanism, an axle, a motor casing sleeved on said axle,transverse bars secured to said motor casing, parallel bars supported bysaid transverse bars, brake shoes and holders supported by said parallelbars, a horizontal lever fulcrumed in ears secured to one of saidtransverse bars and means connecting the horizontal lever to the brakeshoes and holders so that they may be operated thereby.

Signed at the city of New York, county of New York, and State of NewYork, this Q9 day of September, 1915.

JOHN S. MCWHIRTER.

opies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C.

